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公开(公告)号：US2797984A
公开(公告)日：1957-07-02
申请号：US45764854
申请日：1954-09-22
Applicant: COWLES CHEM CO
Inventor： ARTHUR SMITH FRED E
IPC: F16N15/00
CPC classification number: F16N15/00 , Y10T137/4891
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